WA's lamb meat production of 4.1 million tonnes in the March quarter was the highest it has been in 18 months and a 20 per cent jump on the same time last year.

However, the federation's meat section president, Jeff Murray, says it is unlikely to last as market conditions will force producers away from lamb.

"With high grain prices and high prices in the grain industry, we get a lot of producers who will swing to grain production because it's more cost-effective use of the land," he said.

"We'll probably see bigger numbers of mutton killed also and when the mutton kill goes up, it's basically ewes that are being slaughtered, so we may well see a drop of production in the coming 12 months."

Total red meat production in WA for March was up 4 per cent on February.